Coleman fuel valve design

There could possibly be another reason why the shut off point is not at the pressurized inlet or fount side of the Coleman valve in this topic.
In the normal light up procedure of the Coleman lantern, one would first pressurize the fount that has been fueled up earlier.
The valve would be initially fully shut. Pressurized fuel would be present within the valve body just behind the packing ring. Some air might be present as well, depending on whether the lantern is being used just after a refill or had been used earlier without the releasing the fount pressure.
If there should be a leak through the valve stem and packing, that'd be quickly noticed before one attempts to open the valve and start lighting up the lantern.
A person in his or her right frame of mind would stop the process and rectify the leakage before proceeding.
That would at least prevent a fire from being started outside the lantern.
If the shut off point is constructed at the pressurized side of the valve, there'd be no warning of a leakage before the valve is turned open. That would be too late because fuel would have leaked out with an open flame present in the vicinity of the point.

 

That makes logical sense, @MYN . With the stem seal being a given, let it be seen to be leaking before rather than after light-up.